syzkaller login: [ 35.621771] BUG: Bad rss-counter state mm:00000000941318e5 type:MM_FILEPAGES val:33 [ 35.623201] BUG: Bad rss-counter state mm:00000000941318e5 type:MM_ANONPAGES val:22 [ 35.796354] ================================================================== [ 35.797441] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.798595] Read of size 8 at addr ffff888016d9e968 by task sshd/220 [ 35.799380] [ 35.799604] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.800502] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.801480] Call Trace: [ 35.801819] [ 35.802103] dump_stack_lvl+0x91/0xf0 [ 35.802593] print_report+0xcc/0x620 [ 35.803087] ? __virt_addr_valid+0x102/0x340 [ 35.803640] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.804268] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.804903] kasan_report+0xbe/0xf0 [ 35.805405] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.806074] vma_interval_tree_remove+0xc75/0xec0 [ 35.806702] vma_prepare+0xc54/0x11a0 [ 35.807195] __split_vma+0x5af/0x950 [ 35.807684] ? __pfx___split_vma+0x10/0x10 [ 35.808216] ? find_held_lock+0x2c/0x110 [ 35.808736] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.809301] ? lock_is_held_type+0x9f/0x120 [ 35.809868] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.810481] ? mtree_range_walk+0x632/0x900 [ 35.811027] ? mas_walk+0x5c7/0x7c0 [ 35.811500] do_vmi_munmap+0x1f1/0x2b0 [ 35.812001] mmap_region+0x1f9/0x2660 [ 35.812480] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.813000] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.813771] ? __pfx_lock_acquire+0x10/0x10 [ 35.814329] ? __pfx_mmap_region+0x10/0x10 [ 35.814889] ? security_mmap_addr+0x7d/0xa0 [ 35.815443] ? get_unmapped_area+0x1f5/0x3f0 [ 35.816018] do_mmap+0x854/0xf00 [ 35.816473] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.816988] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.817563] ksys_mmap_pgoff+0x3af/0x500 [ 35.818084] do_syscall_64+0x3f/0x90 [ 35.818569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.819215] RIP: 0033:0x7fa574d43d82 [ 35.819680] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 35.821837] RSP: 002b:00007ffca3dd08b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.822756] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa574d43d82 [ 35.823603] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa57417d000 [ 35.824471] RBP: 00007fa57417d000 R08: 0000000000000009 R09: 0000000000001000 [ 35.825327] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d8fed7f70 [ 35.826196] R13: 00007ffca3dd08d0 R14: 00007ffca3dd0900 R15: 00007ffca3dd0c60 [ 35.827074] [ 35.827367] [ 35.827584] Allocated by task 213: [ 35.828010] kasan_save_stack+0x22/0x50 [ 35.828517] kasan_set_track+0x25/0x30 [ 35.829014] __kasan_slab_alloc+0x59/0x70 [ 35.829549] kmem_cache_alloc+0x16b/0x370 [ 35.830093] vm_area_dup+0x20/0x160 [ 35.830549] __split_vma+0x170/0x950 [ 35.831017] split_vma+0xc6/0x110 [ 35.831463] mprotect_fixup+0x8d2/0xb30 [ 35.831965] do_mprotect_pkey+0x87e/0xd40 [ 35.832487] __x64_sys_mprotect+0x78/0xc0 [ 35.833010] do_syscall_64+0x3f/0x90 [ 35.833484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.834138] [ 35.834357] Freed by task 210: [ 35.834756] kasan_save_stack+0x22/0x50 [ 35.835260] kasan_set_track+0x25/0x30 [ 35.835753] kasan_save_free_info+0x2b/0x50 [ 35.836289] __kasan_slab_free+0x10a/0x190 [ 35.836822] kmem_cache_free+0x10d/0x4d0 [ 35.837338] rcu_core+0x8c8/0x2860 [ 35.837797] __do_softirq+0x1b7/0x7d4 [ 35.838273] [ 35.838491] Last potentially related work creation: [ 35.839149] kasan_save_stack+0x22/0x50 [ 35.839658] __kasan_record_aux_stack+0x8e/0xa0 [ 35.840247] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.840890] remove_vma+0x139/0x170 [ 35.841341] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.841925] do_vmi_munmap+0x1f1/0x2b0 [ 35.842412] __vm_munmap+0x138/0x3a0 [ 35.842880] __x64_sys_munmap+0x59/0x80 [ 35.843389] do_syscall_64+0x3f/0x90 [ 35.843865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.844512] [ 35.844726] The buggy address belongs to the object at ffff888016d9e910 [ 35.844726] which belongs to the cache vm_area_struct of size 168 [ 35.846228] The buggy address is located 88 bytes inside of [ 35.846228] freed 168-byte region [ffff888016d9e910, ffff888016d9e9b8) [ 35.847636] [ 35.847855] The buggy address belongs to the physical page: [ 35.848509] page:000000004cf87457 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d9e [ 35.849610] memcg:ffff88800f2e5a01 [ 35.850046] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.850701] page_type: 0xffffffff() [ 35.851156] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.852072] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2e5a01 [ 35.852974] page dumped because: kasan: bad access detected [ 35.853638] [ 35.853860] Memory state around the buggy address: [ 35.854445] ffff888016d9e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 35.855328] ffff888016d9e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 35.856195] >ffff888016d9e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.857057] ^ [ 35.857861] ffff888016d9e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 35.858716] ffff888016d9ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.859563] ================================================================== [ 35.860476] Disabling lock debugging due to kernel taint [ 37.818251] BUG: Bad rss-counter state mm:00000000628b970d type:MM_FILEPAGES val:33 [ 37.819182] BUG: Bad rss-counter state mm:00000000628b970d type:MM_ANONPAGES val:22 [ 38.407562] BUG: Bad rss-counter state mm:00000000a8ccc46d type:MM_FILEPAGES val:33 [ 38.408784] BUG: Bad rss-counter state mm:00000000a8ccc46d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15018' (ECDSA) to the list of known hosts. 2023/06/20 04:31:31 fuzzer started 2023/06/20 04:31:31 dialing manager at localhost:44161 2023/06/20 04:31:31 checking machine... 2023/06/20 04:31:31 checking revisions... [ 39.065776] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:31:31 testing simple program... [ 39.114808] cgroup: Unknown subsys name 'net' [ 39.178411] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:31:26 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000246 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8452fffc RBP=ffffffff856d8220 RSP=ffff88800ec97c80 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff8880087b6500 R13=ffff88800c7c8e00 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff8450b8ad RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007eff07940900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007eff07ef80b0 CR3=000000000ea32000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffffffff85d88408 RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff86088c1a RDI=ffffffff85d88408 RBP=ffffffff85d88408 RSP=ffff88806cf09990 R8 =ffffffff86088c1a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d88408 R13=ffffffff85d88408 R14=ffffffff85d88408 R15=dffffc0000000000 RIP=ffffffff8112fc8c RFL=00000206 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f20c85d0810 CR3=000000000cb2e000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=9f123bf66b522fb7c7454f6f373acf63 XMM02=000000000011fc08ec2efd57dc4c00df XMM03=00000000001243a893b7392b98e61099 XMM04=3c9df4204784ae9e00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133eb0 XMM06=6cfb071fad533d6c0000000000132d18 XMM07=e042d86d42eb936e0000000000124628 XMM08=93b7392b98e61099000000000011fc68 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000